java: double decompiler invocation avoided
Make findOutermostLineComment method in JsonPsiUtil more general
Escapes-aware spell checker for JSON string literals

Extract logic related to searching of escape sequences inside string literal to
separate method and use it both in spell checking strategy and string literal
annotator.
Remove previous version of spellchecking strategy for JSON
External system: external project data storage added (initial version with in-memory implementation).
To get the most recent data use com.intellij.openapi.externalSystem.service.project.manage.ProjectDataManager#getExternalProjectData method
Merge remote-tracking branch 'origin/master'
Merge remote-tracking branch 'origin/master'
IDEA-130019 Unexpected setting of Breakpoints on clicking at line starts
Gradle: code clean-up
tweak bound a bit for transparent progress indicator